Scrambled display after the latest board update

I'm seeing a scrambled display when I open a board, read a post, and then go back to the board level by clicking on the board link at the bottom of the post. See the attached sample. The error occurs with multiple browsers and more than one PC.

Edit: I have to go back two levels to get the scrambled page. IE
Open Windows 8 forum
Read Post
Click on the Windows 8 Forum link at the bottom
Click on the Windows link.
Get scrambled display
Click on lounge and its back to normal.

Thanks for the pm rui. I had actually received a PM last night, and I informed our IT guys. I am hoping to make time to look into it myself later today. Honestly though, I'm pretty amateur with HTML/PHP and CSS, but it won't stop me from trying.

It looks like a problem with the CSS styling, but I am not sure why as the patches performed Friday should not have affected appearance things like this.

Thanks for the update Matt. I also noticed that clicking anywhere on a message content highlights the whole message with a glaring yellow background. doesn't really bother anything but its a little jarring when you first experience it.

Just noticed it only happens when I use Internet Explorer (both IE 9 and IE 10) and when it goes yellow, the check box gets set. When I use Chrome, It only turns yellow when I click the check box itself, not when I click on body text.